Test fails because it uses pyyaml wrong

[dvzrv]

Upon trying to package 1.7.0 for Arch Linux I ran the test suite.
Unfortunately test_generate_template uses pyyaml wrong, by attempting to use load() without a loader (see documentation). It is unclear how that test has ever passed NXP's internal CI, as at least the latest versions of pyyaml do not support calling load() like that.

[mwsk]

This has been solved in 1.7.1 release using: safe_load()
data = yaml.safe_load(f)